Cincinnati Edition explores Earth Day themes on Thursday's show. The fight against climate change is being waged to varying degrees globally, but it can also be fought in the kitchen and in our lifestyles, argues author Paul Greenberg. The best-selling writer of the book Four Fish is back with a new title, The Climate Diet: 50 Simple Ways to Trim Your Carbon Footprint. In the new book, Greenberg explains how we can choose foods that are more environmentally friendly (like opting for more chicken and less beef, and also cutting back on cheese). He also writes how the way certain types of food are brought to our markets can also be detrimental to the environment. For example, out of season produce is often flown to our area, while frozen products have a longer shelf life and can be transported by ship, leaving a smaller carbon footprint.